JPS604369B2 - Fluid flow direction control device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION An object of the present invention is to obtain a large deflection angle with a small rotation angle of the control plate by deforming the upstream side of the control plate of a fluid flow direction control device.

In explaining the present invention, prior art that is not publicly known will be described with reference to FIG. 1 in order to facilitate understanding of the present invention. FIG. 1 shows a flow direction control device.

1 is an upstream passage, 2a and 2b are nozzles, 3a and 3b are guide walls, and 4 is a control plate that rotates around a shaft 5.

Explain the operation. First, the case where the control board 4 faces horizontally will be explained. The flow that entered the upstream channel 1 is controlled by the control plate 4.
The upper flow is divided into a bias flow Fa and a flow Fb along the control plate 4, which merge again at the nozzle portion 2 to form a slightly downward flow Fc. For convenience, the expressions ``upper side'' and ``lower side'' are used, but in reality, operation is possible in any direction. Similarly, for the flow below, Fc and F'c
The two merge and exit as a forward flow Fo. Next, FIG. 3 shows a case where the control plate 4 is oriented slightly downward. Out of the lower flows F'a and F'b, the flow F'b goes downward because the control plate 4 faces downward, and becomes the two combined flows F'
c will be pointing slightly downward. When F'c points slightly downward, the flow F'c begins to flow along the guide wall 3b due to the entrainment effect between the guide wall 3b and the guide wall 3b. In other words, the flow adheres to the guide wall due to the Coanda effect. On the other hand, the flow above the control plate is a flow Fc which is a combination of Fb and Fa, which is directed slightly downward and is attracted by the flow F'c adhering to the guide wall 3b, merges with the flow F'c, and both adhere to the guide wall 3b. Then flow Fo
and leaves. Since the degree to which the flow F'c adheres to the guide wall changes depending on the inclination of the control plate 4, the outflow direction of the combined flow FD changes depending on the inclination 8 of the control plate 4. That is, by tilting the control plate 4 by an arbitrary angle 81, the flow can be blown out in the direction Q of the enlarged arbitrary angle. Therefore, the control board 4
It has the advantage of being able to greatly deflect the flow with just the torque needed to rotate it. However, if you want to automatically control the rotation of the control board using a solenoid, motor, etc., it is desirable to obtain a larger deflection angle Q with a smaller control board rotation angle 8 due to the characteristics of the solenoid and efficiency. ing. The present invention has been made in view of the above points, and one embodiment thereof will be described below. Note that the present invention is particularly aimed at increasing the downward deflection angle. FIG. 4 shows the flow direction control device of the present invention.

I designates an upstream flow path, 2a and 2b are nozzles, 3a and 3b are guide walls, and 4 is a control plate that rotates around a shaft 5, and is provided with a bent portion 4a. FIGS. 5 and 6 are diagrams showing the operating principle. FIG. 7 shows an example in which the present invention is applied to a wall-mounted heat pump. 6 is a wall-mounted indoor heat pump unit.

7 is a heat exchanger, 8 is a blower, and 9 is an air conditioning flow outlet, that is, a flow direction control device of the present invention.

1 is a rear guider for the blower 8, and 11 is a stabilizer.

12 is a fog tray of the heat exchanger 7, 13 is a filter, 14
15 is the main body casing, and 15 is the front grill.

16 is a suction part of the front grill.

Reference numeral 17 denotes a blade that deflects the flow in the left-right direction when the indoor unit 6 is viewed from the front.

FIG. 8 shows the operating principle in the prior art when the control plate is oriented upward, and FIG. 9 shows the operating principle in the present invention. Next, the operation will be explained.

In FIG. 4, the flow that has entered the upstream channel 1 is separated into a flow above the control plate and a flow below the control plate at the most upstream end of the bent portion 4a. In FIG. 4, since the control plate 4 faces downward, the flow that enters downward becomes a flow that adheres to the guide wall 3b as in the case of the prior art described above. On the other hand, the upper flow is a flow induced by the lower flow. control board 4
The opposite is true if it is pointing upwards. Experiments have confirmed that when the angle Q and position of the control plate are constant, the larger the ratio of the lower flow to the upper flow, the easier the two flows merge, and the downward deflection angle becomes larger. has been done. That is, the larger the lower flow velocity is relative to the upper flow velocity, the larger the deflection angle Q can be taken. Therefore, it can be seen that by providing the bent portion 4a, the ratio of the lower inlet to the upper inlet increases, and therefore the flow velocity of the lower flow increases and the deflection angle increases. Although the bent portion is shown as a straight line in the figure, the same effect can be obtained with a curved line. The 10th case is a curved line.
As shown in the figure. The operating principle is the same, but the curve has the advantage of less resistance to flow. On the other hand, straight bending has the advantage of being easy to manufacture. However, since the principle is the same, the explanation will be given below in terms of straight folding. The bending angle is determined by the setting range of the rotation angle of the control plate, and must be set within a range where the tip of the bending portion 4a comes to the most upstream end when the control plate is rotated. Next, the deflection process will be explained with reference to FIGS. 5 and 6. FIG. 5 shows a case where the control plate 4 is placed horizontally, and the flow entering the upstream channel 1 is separated into the upper side and the lower side of the control plate 4 at the tip of the bent portion 4a. In this case, a difference occurs between the flow rates on the upper side and the lower side, but since the control plate 4 is oriented horizontally, the flows Fc and F'c are oriented in the opposite direction to the guide wall, as in the case of the prior art. Flows Fc and F'c are merged because they do not adhere to F. is oriented almost horizontally. When the control plate 4 is directed downward, the flow rate under the control plate increases due to the effect of the bent portion 4a, as shown in FIG.
Since the flow velocity of becomes larger than the flow Fc, the flows Fc and F
'c becomes easier to merge, and the deflection angle of the merged flow Fo becomes larger. FIG. 7 shows an example in which the present invention is applied to a wall-mounted heat pump.

In order to improve the air conditioning effect and the human body's sensation, heat pumps use downward blowing for heating, horizontal blowing for cooling, and horizontal blowing to prevent cold air from hitting the body when the DI or thermostat is turned FF during heating. It is necessary to switch the blowing direction, such as switching to blowing. It is troublesome to manually switch between these settings one by one, and there is a problem in that the equipment must be installed within easy reach. Therefore, an attempt was made to electrically detect the blowing temperature and use a solenoid or the like to move a control plate to automatically change the blowing direction. However, in the prior art described above, in order to obtain a predetermined deflection angle, the rotation angle range of the control plate becomes large, and a large solenoid is required. Also, one way to reduce the rotation angle range is to make the inside of the control board wider, but this would increase the rotational torque of the control board, making it impossible to make the solenoid smaller and requiring a lot of material. There is a problem. The present invention was applied to solve this problem. In FIG. 7, the air-conditioned flow is sucked in from the atmosphere by the blower 8, passes through the filter 13 and the heat exchanger 7, and is emitted by the air-conditioned flow blow-off section 9 to which the present invention is applied, with the blowing direction being considered. The blowing direction is configured to be changed by rotating the control plate 4 using a solenoid. In the figure, when blowing, the control plate 4 may be turned downward, but as described above, the angle at which the control plate is rotated may be smaller than in the case of the prior art. In the case of horizontal blowing, the control plate 4 must be directed upward, but the operation in this case is shown in Figures 8 and 9.
This will be explained in the figure. Although FIG. 8 shows the case of the prior art, the principle is the same as in the case of the downward direction. Although it was not mentioned earlier, when the control board is tilted beyond a certain angle, a vortex C is generated.
In the case of the prior art, when the control plate angle is tilted to obtain the required deflection angle, a vortex C is generated, which prevents the upper and lower jets from merging. As shown in FIG. 9, by forming the control plate according to the present invention, generation of vortices can be prevented. Therefore, the merging of the two jet streams becomes easier, and the obstruction to merging caused by the lower flow rate on the upper side due to bending of the control plate is compensated for. Therefore, even when the control plate is turned upward, the deflection angle does not deteriorate, and there is an advantage that the air flow resistance is reduced by the amount of vortices no longer generated. Therefore, as a whole, the rotation angle of the control plate is small and a predetermined deflection angle can be obtained.

This allows the solenoid to be made smaller. In addition, in the prior art, there was a problem that the flow was disturbed by the influence of the left and right deflection vanes 17 and the deflection angle worsened, but in the present invention, the two jets above and below the control plate can easily merge. There is less turbulence in the flow and deterioration of the deflection angle can be reduced. Another problem with the prior art is that the control board flexes under its own weight and vibrates due to air conditioning flow. This can be prevented by adding a reinforcing material, but this has the disadvantage that the rotational torque of the control plate increases as a result.
According to the present invention, as a result of bending the control plate itself, the section modulus can be increased without using a reinforcing material, and deflection and vibration can be reduced. Note that the bending portion 4a of the control plate 4 may be formed into a smooth arc shape as shown in FIG.

As is clear from the description of the embodiments above, the fluid flow direction control device of the present invention has the following effects by deforming the upstream side of the control plate. [1} The downward deflection angle can be increased without worsening the upward deflection angle.

Therefore, since a predetermined deflection angle can be obtained by rotating the control plate angle by a small overall angle, automatic control using a solenoid or the like is facilitated. (2) In the case of downward flow, the flow rate on the side adhering to the guide wall increases, making it easier for the flows above and below the control plate to merge, reducing the deterioration of the deflection angle due to additional resistance from left and right deflection vanes, etc. be able to.

{3- Providing the bent portion increases the section modulus of the control plate, reducing the adverse effects of deflection of the control plate and vibrations caused by wind. Therefore, reinforcing materials for the control plate for preventing deflection and vibration can be omitted, reducing the rotation torque of the control plate and reducing unnecessary materials.

[Brief explanation of the drawing]

FIG. 1 shows a fluid flow direction control device in the prior art of the present invention, FIGS. 2 and 3 are diagrams of the operating principle of FIG. 1, and FIG. 4 shows a fluid flow direction control device in an embodiment of the present invention. The cross-sectional view, FIGS. 5 and 6 are diagrams of the operating principle of the device shown in FIG. 4,
Figure 7 is a cross-sectional view of a wall-mounted heat pump type air conditioner that employs the same device, Figures 8 and 9 are diagrams of the operating principle when the control board is facing upward, and Figure 8 is the prior art device; FIG. 9 shows a fluid flow direction control device according to one embodiment of the present invention, and FIG. 10 is a sectional view of a fluid flow direction control device according to another embodiment of the present invention. 1... Upstream channel, 2a, 2b... Nozzle, 3a, 3
b...Guide wall, 4...Control board, 4a...Bending portion,
5... Axis. Figure 1 Figure 2 Figure 3 Figure 4 Figure 5 Figure 6 Figure 7 Figure 8 Figure 9 Figure 10

Claims (1)

[Claims] 1. One nozzle that constricts and ejects the flow of fluid, at least one guide wall provided in a gradually expanding shape downstream of this nozzle, and a control that rotates around an axis to control the streamline state of the fluid. A fluid flow direction control device comprising a plate, the control plate having a bent portion at an upstream end thereof.